How to manage french accents properly?

[Caius Aérobus]

Hello,
my problem is as simple as 123: I want to display french text, ie containing accents. I have tried almost all combinations with QString::from and QString::to without any success. For instance what is wrong here?

QString title=QString::fromLocal8Bit("Coordonnées parallèles");
printf("%s\n", title.toLocal8Bit().data());

QString title=QString::fromLocal8Bit("Coordonnées parallèles");
printf("%s\n", title.toLocal8Bit().data());

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Output:

Coordonnes Parallles

Coordonnes Parallles

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